netdev - Re: Kernel panic in inet_twdr_do_twkill

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Date:	Thu, 14 May 2009 11:42:02 +0200
From:	Daniel Lezcano <daniel.lezcano@...e.fr>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	netdev@...r.kernel.org, "Denis V. Lunev" <den@...nvz.org>
Subject: Re: Kernel panic in inet_twdr_do_twkill_work

Eric W. Biederman wrote:
> Daniel Lezcano <daniel.lezcano@...e.fr> writes:
>
>   
>> May be you can activate the NETNS_REFCNT_DEBUG in order to check if the timewait
>> socket
>> were destroyed at the namespace destruction ? Unfortunately it looks like the
>> option is not in the Kconfig :(
>>     
>
> Looks like a good starting place.
>
> I will enable that when I respin my internal kernel.
>
> I don't have a good reproducer at the moment....  So I was hoping we could
> figure this out with code inspection.
>   
I found this one which makes a lot of timewait sockets. I tried on a 
2.6.29 kernel and I was not able to reproduce it. Can you check if this 
program reproduce the bug ?

View attachment "timewait.c" of type "text/x-csrc" (2287 bytes)